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(No Model.) 6 Sheets-Sheet 1.

- B. R. KNOWLES & B. H. PARK. STAND FOR GONTROLLINGBLEGTRIG CIRCUITS.

No. 520,788. Patented June 5, 1894.

Wwplzaszsmafw @ZM (No Model.) 6 Sheets-Sheet 2. E. R. KNOWLES & E. H.PARK. STAND FOR CONTROLLING ELE-OTRIO CIRCUITS.

No. 520,788. Patented June 5, 1894.

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(No Model.) 6 Sheets-Sheet 3. E. R. KNOWLES & E. H. PARK. STAND FORCONTROLLING ELECTRIC GIRGUITS.

Patented June 1894.

WI Tr ESSES- (No Model.) 6 SheetsSheet 4.

B. R. KNOWLES & B. H. PARK. STAND FOR CONTROLLING ELECTRIC CIRCUITS.

No. 520,788. Patented June 5, 1894.

HE- I L I W |TNE55E5 I INVENTUKE (No Model.) a Sheets-Sheet 5.

E. R. KNOWLES & E. H. PARK.

STAND FOR CONTROLLING ELECTRIC CIRCUITS.

No. 520,788. Patented June 5, 1894.

FTE-9.

WYTHESBES (No Model!) 6 Sheets-Sheet s. E. R. KNOWLES & B. H. PARK.STAND FOR CONTROLLING ELECTRIC CIRCUITS. No. 520,788.

Patented June 5, 1894.

UNITED STATES PATENT Crrrcn.

EDW'ARD R. KNCYVLES, OF MIDDLETOWN, CONNECTICUT, AND EDWVIN H. PARK, OFMILLBURY, MASSACHUSETTS, ASSIGNORS TO THE SCI-IUYLER ELECTRIC COMPANY,OF CONNECTICUT.

STAND FOR CONTROLLING ELECTRIC CIRCUITS.

SPECIFICATION forming part of Letters Patent No. 520,788,11ated June 5,1894 Application fi March 31, 1893. Serial No. 468,473. (No model.)

To all whom it may concern:

- Be it known that we, EDWARD R. KNOWLES, residing at Middletown, in thecounty of Middlesex and State of Connecticut, and EDWIN H. PARK,residing at Millbury, in the county of XVorcester and State ofMassachusetts, citizens of the United States, have invented certain newand useful Improvements in Stands for Controlling Electric Circuits; andwe do declare the following to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the art to whichit appertains to make and use the same, reference being had to theaccompanying drawings, and to the letters and figures of referencemarked thereon, which form a part of this specification.

Our invention relates to apparatus for controlling currents ofelectricity supplying power to electric translating devices, such asmotors and lamps. Vhile it is usefulin controlling, either at a distanceor near by, one or more translating devices of any kind, yet it has beenmore particularly designed to govern an electric search light, orprojector, and we shall, for the sake of simplicity, describe it asapplied to such use.

In the modern form of electric search light,

there are five things to be considered: first,

the movement of the projectorin a horizontal plane; second, its movementin a vertical plane; third, a vibrating or to-and-fro movement in ahorizontal plane; fourth, the adjustment of the diverginglens; andfifth, the regulation of the lamp. The various movements of theprojector and lens are effected by one or more electric motors suitablygeared, while the lamp is controlled by a rheostat, as usual.

Our invention consists in a compact stand, in which are mounted theseveral switches, rheostats and measuring instruments for controllingthe motors and the lamp, the stand being electrically connected with thepro ector or other translating device, preferably by means of flexibleconductors, so that the stand or the projector can be moved to anyconvenient part of the vessel or building, without interfering with theoperation of the apparatus. For instance, the projector on a vessel maybe mounted on a pilot house or turret, or in the top of a mast, or otherele vated place, and the controlling stand located below deck in someprotected spot, where the operator is in no danger, and yet has perfectcontrol over the movements of the projector, its lamp, and its diverginglens. The parts are so arranged that the movements of the varioushandles are those most-natural for the operator to make, in order toswing the beam of light up or down, or to the right or left hand.

The controlling stand is preferably portable; but it may be constructedto be fastened against the wall at some convenient point. This style isbetter adapted to places where space is limited, as, for example, onshipboard.

In the drawings,-Figure l is a front elevation of a portable standembodying our invention. Fig.2 is a side elevation. Fig. 3 is a View ofa switch, and rheostat contacts. Fig. 4 is a section on line 4-4, Fig.3. Fig. 5 is a view of the cable box with the cover removed. Fig. 6 is asection on line 6-6, Fig. 5. Fig. 7 is a sectional plan view on line7-7, Fig. 2. Fig. 8 is an elevation of the motor rheostats. Fig. 9 is aside elevation of a stationary or wall controlling stand. Fig. 10 is afront elevation of the same. Fig. 11 shows the motor rheostats in theWall stand; and Fig. 12 is a diagram of the circuits.

Taking up first the portable stand, it will be seen that it consists ofsuitable legs A, preferably of angle-iron, braced, if desired, bydiagonal rods a. The legs support a case B, quadrant-shaped in verticalcross-section, with the curved side forming the front and top, andcontaining two parallel slots 19, to permit the movement of the leversC, C, which project through the slots and govern the motor rheostats andswitches inside the case, as hereinafter described, lever C controllingthe movement of the projector in a horizontal plane, and lever C itsvertical movement. Each lever has a handle 0. On the back of the caseare the cable boxes D, D in which are the several terminals of thecircuits in the stand. Under the case is hung the box E, containing aswitch E operated by the handle e for opening and closing the lampcircuit. Just above this box is a switch-plate F having threeterminalsfifflf, and a plug F, for closing the circuit through the voltmeter G, which, with the ammeter H, is mounted on the case B, in frontof the operator. Between the legs A is arranged the rheostat I with itshandled for regulating the lamp. A push button J in the front of thecasing controls the lens motor, and the automatic vibrating movement ofthe projector is set in action by the switch-handle K.

Having thus given a general idea of the arrangement, and the uses of theseveral handles shown in the drawings, it is in order to describe theseveral parts in detail.

Inside the casing 13 are two frames or partitions Z) of insulatingmaterial, such as slate, to the outside of each of which is fulcrumed atc the lever G or 0. Each lever has an arm 0 which bears against thesmooth inner face of a stationary quadrant The arm may be resilient, andin addition thereto, or in lieu of such resiliency, a spring 0 may beinserted between the arm and the lever, the object being to keep theinner face of the lever tightly pressed against the contact plates Zwhich constitute the terminals between the coils of the rheostats L, L.The two rheostats are mounted on an iron frame M between the partitionsZ), and the connections between them and the contact plates Z are madeinside the case B. The coils of the rheostats are preferably insulatedfrom each other and from the frame M by sheets of non-conductingmaterial m. Each rheostat is divided into two portions, as indicated inFig. 12, which are not connected with each other, so that the lever inthe middle of its throw is disconnected from both portions.

The projector has two motors N, N, one for effecting the horizontal, andthe other the vertical, movement. The field magnet of each motor has twopole pieces on opposite sides of the armature,wound in oppositedirections so as to present like poles to the armature. The ends of thewindings at the two poles are connected and one brush of the armature isconnected with this wire. The currentis sent through only one fieldmagnet coil at a time, each coil being in circuit with its respectiveportion of the rheostat L or L. The armature is in series with bothcoils, and the current flows through it always in the same direction.The cores of the field magnets are magnetically connected by the frameit of the motor, so that whichever pole piece is energized, there willbe an opposite polarity induced in the other pole piece. It will be seenthat these motors can be instantly stopped and reversed by throwing overthe levers C, O; and without any sparking at the brushes, the wires fromthe field coils being connected withthe outer ends of their respectiveportions of the rheostats. The coils of the rheostats are so connectedwith the contact plates that as the lever is moved from the outer end ofeither portion of the rh eostat (the position of maximum speed of themotor) toward the middle of its throw, the resistance is increased,until it reaches a maximum and the motor has the least current justbefore the circuit is opened by the switch lever passing off the contactplate nearest the middle. By continuing its movement, the lever closesthe circuit through the other field coil and through the whole of thatportion of the rheostat, the resistance being lessened and the speedincreased as the lever moves toward the outer contact plate.

Referring to Fig. 12, it is seen that the current from the main :0passes by the lead y to the levers O, C, thence through one portion orthe otherof the rheostats L, L to the wires 1 or 2, 5 or 6, the contactpins 1 or 2, 5or 6", in the cable box D on the controller stand, thenceby conductors 1 or 2 5 or 6 to corresponding contact pins 1 or 2 5 or 6in the cable box D on the projectorbase, thence by wires 1 or 2 5 or 6to the proper field coils of the motors N, N in the base of theprojector, thence through the armatures of. said motors and by wire 7 tothe contact pin 7 in the cable box D, thence by way of the conductor 7contact pin 7 in box D, and wire 7, to the switch 0, lead 3 and main 00.

To accomplish the automatic vibration of the projector through a givenare in a horizontal plane, the revolving standard of the projector hasfastened to it two adjustable fingers (indicated in dotted lines in Fig.12) which engage with a reversing switch 0, arranged to turn the currentin the wire 4 through one or the other of the field coils of the motorN, which effects the horizontal movement. The wire 4t connects bycontact pin 4 conductor 4 contact pin 4t and wire 4 with a switch K bymeans of which the lower portion of the rheostat L can be connected witheither the wire 1 or the wire 4 at will. The switch 0 enables all themotor circuits to be opened and closed at will.

The projector is fitted with a diverging lens, which has a lateralmovement across the front of the drum. This is arranged to be actuatedby an electric motor N on the projector, connected with the lens frameby suitable gearing. The motor is in a derived circuit from the mainscc, 0c, the current passing by the wire 3 to contact pin 3, thence byconductor 3 pin 3 and wire 3 to the motor N and thence to the returnwire 7. A normally open push button J enables the circuit to be closedat will to start the motor N and move the diverging lens.

The above described circuits and switches give the operator perfectcontrol over the movements of the projector and diverging lens. Itremains to describe the lamp-governin g devices.

The lamp circuit passes through a rheostat I, preferably made of stripsof German silver wound back and forth on pins projecting from rigidframes 2', from which the strips are in- IIC sulated. The frames aresupported between the legs A of the stand, and the strips are preferablyarranged with their edges in vertical planes, to give a good circulationof air. The connections between the coils are brought to contact plates4?, over which sweeps the switch lever 2', preferably made like the levers O, O. The terminals of the rheostat are at i by means of which itis connected in circuit with the positive main 0c, the amineter II, andone side of a double pole switch E. The negative main 0c is brought tothe other side of this switch,which thus controls the lamp circuit, theterminals of which in the controller stand are the pins in the cable boxD Conductors (I connect these with the corresponding pins in a cable boxD on the projector base, whence wires lead to the contact rings Q, fromwhich the current is taken off by sliding contacts on the yoke of theprojector and conducted to the double pole switch E carbons R, and lampmagnets R, R

The volt meter G has one binding post connectedwith one of the mains,and the otherpost connected with the middle plate f of the doubleplugswitch F. One of the other plates is connected with the other main,and the other plate is connected with the conductorleadin g from therheostat to the lamp. By means of the plug F, the circuit may be closedthrough the volt meter across either the generator or the lamp mains.

The cable boxes are constructed as follows: In a suitable frame on thestand is secured a plate S of insulating material, in which are metallicbushings T, having at one end an internal flange. A pin T has a collarwhich fits the bushing, and abuts against the flange. A spring T isconfined between the collar and a nut secured in the other end of thebushing. Ascrew-plug tenables the conductor from the motor or lamprheostat or other source to be connected with the bushing and theyielding pin T. The cable box cover is a hollow casting U adapted to befastened to the controller stand over the plate S. It contains a similarplate S, in which are secured fixed contact pins 8, the outer ends ofwhich are arranged to register with the pins T, and the inner ends ofwhich have connected to them the several conductors, 1 2 &c., which aregathered into a cable. For convenience, two sets of cable boxes areshown, one for the motors and the other for the lamp, but it is evidentthat all the connections may be made with one set of boxes and onecable.

In the modification shown in Figs. 9, 10 and 11, the change is simply inthe arrangement of the parts, to get a more compact apparatus. Thecasing is tall and flat, the lamp rheostat being arranged vertically.The front and sides may be covered with wire netting to protect theparts and yet allow free circution of air. The apparatus can be fastenedagainst the wall, and occupies but little room.

The frontof the case is preferably of slate to afford suitableinsulation for the switch handles.

Having thus described our invention, what we claim is- 1. A stand forcontrolling electric translatin g devices, comprising one or morerheostats, one or more circuit-controlling switches, an ammeter incircuit with one of said rheostats, a volt meter, and a switch forclosing the circuit through said volt meter, either across the supplymains or across the leads to the translating device, at will,substantially as described.

2. A controlling stand for electric translating devices, comprising tworheostats, each divided into two unconnected portions, and each having aswitch lever adapted to close the circuit through successive coils ofeither portion, and a switch for causing the current through one portionof one rheostat to flow through either of two independent circuits,substantially as described.

3. A controlling stand for electric translating devices, comprising aswitch lever, a series of contact plates therefor, and a rheostatdivided into two unconnected portions, one terminal of each beingconnected to the end contact plates, and the other plates beingconnected successively with the successive resistance coils, theadjacent terminals of the rheostats being unconnected, substantially asdescribed.

4:. A controlling stand for electric translating devices, comprising acase, two rheostats inclosed therein, switch levers for said rheostatshaving handles outside of said case, a rheostat supported between thelegs of the stand, a switch suspended under the case and in circuit withsaid rheostat, and a switch controlling the circuit through one of saidrheostats, substantially as described.

5. A stand for controlling electric circuits, comprising a casecontaining two rheostats, each divided into two portions and eachportion included in a separate circuit, a switch lever for each rheostatadapted to close one or the other of the circuits through successivecoils, and a switch adapted to turn the current from one of saidcircuits through an independent circuit, substantially as described.

G. The combination with a case B of two slate partitions Z), a frame Marranged between said partitions, two rheostats L L supported on saidframe, contact plates ll mounted on said plates, and levers G Cfulcrumed on the outer side of said partitions and making contact withthe plates Z Z, substantially as described.

7. In a stand for controlling electric circuits, the combination with aninsulating plate, of metallic bushings inserted therein, pins sliding inand projecting from one end of said bushings, screw plugs inserted inthe ICC other ends of the bushings, and springs, confined between saidscrews and the pins, substantially as described.

8. In a stand for controlling electric circuits, the combination withthe stationary insulating plate S carrying spring pins '1", of themovable box U containing the insulating plate S carrying rigid pins 8,substantially as described.

9. A stand for controlling electric circuits, comprising the oppositelyarranged rheostats L L, the levers O O for controlling them, therheostat 1, its switch lever 2', the circuit-controlling switch E, theammeter II, the volt meter G, and the double plug-switch F,substantially as described.

10. Astand for controlling an electric search light, comprising a doublerheostat and switch lever for controlling the vertical movement of theprojector, a similar rheostat and switch for controlling the horizontalmovement, an additional switch for the automatic vibratory movement, apush button for controllingthe lens motor, and'a rheostat and switch forthe lamp circuit, substantially as described.

' 11. A stand for controlling an electric search light provided withreversible motors for producing respectively the vertical and thehorizontal movements of the projector, comprising a reversing switch foreach motor, and a rheostat for each motor composed of two unconnectedoppositely arranged portions controlled by the switch, substantially asdescribed.

12. A stand for controlling an electric search light provided with areversible motor for producing the horizontal movement of the projector,and having a separate motor circuit containing a reversing switch, saidstand comprising a rheostat and switch for controlling the motor, andanother switch for closing the circuit through said separate motorcircuit and reversing switch, substantially as described.

13. A stand for controlling an electric search light, comprising asuitable inclosing case, a volt meter and ammeter mounted on top of saidcase,a motor-controlling switch lever on each side, moving in a verticalplane, switch handles for the lens motor and the automatic horizontalmovement located below the motor switch handles, a double pole switchfor the lamp circuit, located below the case, and a lamp rheostat andswitch handle supported between the legs of the stand, substantially asdescribed.

14. In an apparatus for controlling electric circuits, the combinationwith asupply main, of four separate parallel circuits, each containing arheostat, and two switch levers, each controlling two of said circuits,and adapted to connect either of them with the supply main through therheostat, substantially as described.

15. In an apparatus for controlling electric circuits the combinationwith a supply main of four separate parallel circuits, each containing arheostat, two switch levers, each controlling a pair of said circuits, areversing switch in a bridge across one pair of circuits,

and a switch adapted to cut out one of said circuits, and close aparallel circuit through said reversing switch, substantially asdescribed.

16. In an apparatus for controlling electric circuits, the combinationwith a supply main of six separate parallel circuits, two switch levers,each controlling a separate pair of circuits through a divided rheostat,a switch controlling a fifth circuit in derivation from one of saidfirst four, a reversing switch in said fifth circuit controlling a shuntacross one of said pairs of circuits, and a normally open push button inthe sixth circuit, controlling a motor therein, substantially asdescribed.

In testimony whereof we hereunto set our hands in the presence of twowitnesses.

EDWARD R. KNOWLES. EDWIN H. PARK. Witnesses for Edward R. Knowles:

G. A. MOKAY, J. A. KENISTON. Witnesses for Edwin H. Park:

N. H. PARK, E. H. VAUGHAN.

